Maueice gandy



(No Model.

. 3 sheets-sheet 1. M. GANDY. CHAIN 0R ROPE BBLTING POR DRIVINGMACHINERY. No. 377,484. Patented-Feb. 7', 1888.

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CHAIN oli-ROPE BBLTING POR DRIVINGMAGHINE'BY. y No. 371.484. yPatented.]5,eb.`7,l888.

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MfGANDY. 'GH-AIN 0R ROPE BELTING PQR DRIVING MAGHINBRY. BT01371484) iPatell'ed'FebfL` 1888.

l MMM UNITED STATES: Pa'drinwr'C)F1ucn;.lf A

' rions reasons.

MAURICE GA/NDY, oFLivEnrooL, ENGLAND, Y

CHAIN canoes BELTING Foamivlvme'MACHINERY.

SPIE!(ZfllCl-"IC ATIONy forming 4part of Illiettersi` Patent N o.377.484, dated February 7kI 1888. l

Application iiledhehruary 16, 1887. Yerlai No.2l7,769. (No model.) i

To @ZZ vwhom it may concern,.- v f 1 Be it known that I, MAURICE GANDY,a subject of the Queen of Great Britain, residing at l16 representlongitudinal sections of bands for driving machinery made accordingtoiny present invention, and the pulleys upon which they run. Figs. 2,4, 6, 8,10, 12, and Y17 represent cross-sections of the same,respectively; and Figs. 13, 14C,y and l5 represent a novel device forconnecting the endsof the ropes which may be used in the practice ofsaid invention.

Bare wire ropesrunning in grooved pulleys have heretofore been used asbelts or bands for driving machinery. While such ropes jhavegreatstrength, still they have two obvious and well-known defects-wiz.,they are decient in gripping-power'and are quickly worn out and becomeuseless by chafing upon the grooves in the metal pulleys upon which theyrun. Round or angular belts of leather have been used,and while theyar'e satisfactory as far as gripping-power is concerned, they are notentirely'free from objections. Their fibrous character permitsy themconstantly to stretch and makes it necessary frequently to shorten themto maintain their driving-power; besides, they are very expensive andare not as strong` as wire-ropes. l

I am also aware that metal chains and wire ropes provided withfriction-surfaces have been used; but in all such belts with which I amacquainted the frictionrblocks or surfaces have been fashioned andcombined or attached tothe chain or rope in such a manner as to make thebelt as a wholeobjeetionable for va-y of improvements on this class ofbelting, and the novel features will be particularly pointed My presentinvention consists out in the claims `concluding this specication. v 'fn vReferring to the drawings, Fig. 1, A rep-- resent the links of achain.v vIB representsa removable link for the purpose of uniting thetwo ends of the chain. v All the small or alternateA links A may be-made of. the const ruc-`l tion represented by yl, or as many of them asmay be deemed advisable may be made ofJ such construction, soA that thechain 'may be readily opened and joined again at any point.,V

rIhe friction-blocks may be made wholly .ofV

wood, leather,fpaper, cork,v ulcanized rubber,

or other suitablematerial, or a combination of any of these, or theymaybe made with ametalsurface.

and size to lit the pulleys, and are separated by intervening `spaces-toallow them to rfun around the pulley without-binding. MTo' utilize theirentire surface for 'gripping the pulley, I usually curve or hollowthesesections to correspond with the periphery of the pulleys on which theyare to run, as illustrated in the drawings. This feature mayhowlever, t(Y in many cases be dispensed with,especially" Y when the blocks aremade o ffor covered'. with vulcanized rubber-or cork, or othercompressible material, as in that case ythey will `accommodatethemselves to the periphery of the pult 1 I ley and gripitthroughouttheir'entirelength Y when made straight. f f. y

l In carrying my invention into practice I may use any form of. chain.Severaldesir'- able forms are inustratedin rigs. 1, 3, 5, 7,

Ini-Fig. lvthe core of the grippingblock', formed of wood, is.illustrated fbyD,"

andy 9.

upon which the gripping material `C'is attached in any suitable mannerand by any desirable means. In Fig. 3 the core of the fricf tionblock ismade of a tube of metal, D',

preferably steel, upon which-the gripping? surface C is attached,preferably .by rivets( (Not shown in fthe-drawings.) Near the ncenter oflthe tube D', in the inside of said` tube, a groove is cut yinto whichthe link Af its,

thereby preventing the friction-block moving' l longitudinally on saidlink, but leavingsu-f-y icient play between thetwo to allow thebl'ock totilt upon the link as apjoint `or socket.

Ico

Fig. 5 shows a square belt, substantially of similar construction vwiththe round belt illustrated in Fig. 1. Fig. 7 shows a square belt ofsimilar construction in many respects to the round belt illustrated inFig. 3. In Fig. 7, however, the friction-blocks are held upon theirrespective links by means of checks F F, inserted insidel of the tubesD. Immediately in top of the metal tube D' a layer of paper is placed,which in time is covered by a layer of cork, or leather, or rubber, C.In Fig. 9 the friction-blocks are attached directly to the long links A,between which are placed the short links A', which likewise permit theblocks to find their bearings on and accommodate themselves to thepulley. These several figures illustrate various forms of chains whichmay be advantageously employed in the practice of my present invention,as well as 'various forms of friction-blocks, and various means ofattaching the blocks to said chains, and are deemed sufficient toindicate clearly the general practice of my invention when link chainsare employed.

Instead of using a link chain I may employ a wire rope, as indicated inFigs. 1l, l2, 16, and 17. Figs. 11 and 12illustrate a V-shaped belt madeto run on a grooved pulley, and Figs. 16 and 17 illustrate a flat beltmade. to run on a plain pulley. The wire ropes H are attached to thecore I of the belt, made of wood, metal, or other suitablematerial,which is covered with a friction-surface, G.

For the purpose of giving the necessary flexibility to the belt and topermit the several friction blocks to accommodate themselvesjwithoutrestraint to the peripheryof the pulley, I attach the blocks to the ropeby a cleat or similar device, grasping the wire rope at intervals andpresenting only suicient bearingsurface on the rope to resist thestrain, thus making an easy clinging fastening, and permitting theblocks to tilt and accommodate themselves readily to the face of thepulley.

I prefer to use a plurality of small ropes placed side byside instead ofa single rope of larger diameter. By so doing I distribute the pressuremore evenly throughout the width of the belt, and I remove the liabilityof the belt to twistandV insure the friction blocks or cushions runningstraight in the grooves, and, besides, as the several ropes may bespliced at different points, the belt is made of more uniform strengththroughout its entire length. I further improve the action of thesefriction-blocks by making the bearing in said blocks for the connectingrope or chain as low as possible, and, where convenient, below the upperedges of the grooves in which they run, thus increasing their stabilityand diminishing the danger of tilting or twisting in the grooves.

If desired, the ropes may be spliced in any Well-known way; but I preferto join the ends by the means illustrated in Figs. 13, 14, and 15. Fig.l5 illustrates aferrule of uniform external diameter, cut with ascrew-thread and having a diminishing or tapering internal diameter, asclearly shown in Fig. 13. Such a ferrule is slipped upon each end of therope, small end first, so that the larger end comes at the extreme endof the rope. The strands of the rope are then forced apart by a pointedtool, and melted solder or cement is poured between the strands,attaching to the strand and making a solid rivet-headed mass and securing the wires firmly in the ferrule. The inside of theferrule may bepreviously tinnedor coated with other metal to which the solder willadhere. In order to increase the space between the strands to receivethe solder or cement and to eliminate from the ferrule all objectionableelements, I burn out the hemp core of the rope before pouring in thesolder. The two ends ofthe rope are then drawn together and aninternally-screw-threaded ferrule (having a right-hand thread cut inonehalf of its length and a left-hand thread cut in the other) isscrewed upon the ferrules L until the necessary tension is secured. Tothis ferrule I then preferably apply a suitable covering to avoid thenoise incident to the striking of the metal ferrule against the face ofthe pulley.

I have now described the general features of my invention and indicatedvarious forms in which it may be applied; and I understand that anyformal change not affecting the principal or general features of theinvention will be included in the foregoing description and in thefollowing claims.

It will be observed that one of the principal features of my inventionconsists in constructing a chain or wire-rope belt in which theindividual friction-blocks will independently and freely adaptthemselves to the surface of the pulley. This may be accomplished byattaching the blocks to a chain, so that they may have an independentmotion of their own, as illustrated in Figs. 1, 2, 3, 4, 5, 6, 7, and 8,or by attaching the blocks firmly to the links and providingintermediate links between them, as illustrated in Figs. 9 and' 10, orby attaching blocks to a wire rope with a limited bearing-surface andplay, so arranged that the rope may bend and describe practically a IOOIIO

true arc in passing around the pulley and then straighten'itself out inrunning between the pulleys. These, or substantially similar devices,maybe employed,so as to give to the friction-surfaces that degree ofadaptability and independence of motion which is essential to the bestforms of belt.

What I claim, and desire to secure by Letters Patent, is-

1. A belt for driving machinery, consisting of the combination of aflexible metal band, friction-blocks attached thereto, and means,substantially as described, for permitting said blocks to tilt on saidband and to accommodate themselves to the surface of the pulleys onwhich they run.

2. A belt for driving machinery, consisting of the combination ofa'iiexible metal chain,

n, V377,484 k v v3 formed of long andshortlinks alternately,and binationof a metall chain, friction-blocks atro.

friction-blocks attached thereto, all substantached thereto, and means,substantially as tially as described. described, for limiting thellongitudinalimove- 3. A belt for driving machinery,y consisting ment ofsaid block on said band.

friction-blocks composed of a metalshellcovlof the combination of aflexible metal band and M ATI-RICE. GANDY;l A

ered with a friction-surface, substantially as Witnesses: f

described. M.` LEE SMITH,

4. In a belt for driving machinery, the com- Y 'CHARLES LADE.

